import "./waves.css";

export default {
  bind(el, binding) {
    el.addEventListener(
      "click",
      e => {
        const customOpts = Object.assign({}, binding.value);
        const opts = Object.assign(
          {
            ele: el, // 波纹作用元素
            type: "hit", // hit点击位置扩散center中心点扩展
            color: "rgba(0, 0, 0, 0.15)" // 波纹颜色
          },
          customOpts
        );
        const target = opts.ele;
        if (target) {
          target.style.position = "relative";
          target.style.overflow = "hidden";
          const rect = target.getBoundingClientRect();
          let ripple = target.querySelector(".waves-ripple");
          if (!ripple) {
            ripple = document.createElement("span");
            ripple.className = "waves-ripple";
            ripple.style.height = ripple.style.width =
              Math.max(rect.width, rect.height) + "px";
            target.appendChild(ripple);
          } else {
            ripple.className = "waves-ripple";
          }
          switch (opts.type) {
            case "center":
              ripple.style.top =
                rect.height / 2 - ripple.offsetHeight / 2 + "px";
              ripple.style.left =
                rect.width / 2 - ripple.offsetWidth / 2 + "px";
              break;
            default:
              ripple.style.top =
                e.pageY -
                rect.top -
                ripple.offsetHeight / 2 -
                document.body.scrollTop +
                "px";
              ripple.style.left =
                e.pageX -
                rect.left -
                ripple.offsetWidth / 2 -
                document.body.scrollLeft +
                "px";
          }
          ripple.style.backgroundColor = opts.color;
          ripple.className = "waves-ripple z-active";
          return false;
        }
      },
      false
    );
  }
};
